11109994999 has 2 divisors, whose sum is σ = 11109995000. Its totient is φ = 11109994998.

The previous prime is 11109994993. The next prime is 11109995021. The reversal of 11109994999 is 99949990111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11109994999 - 2¹¹ = 11109992951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11109994993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554997499 + 5554997500.

It is an arithmetic number, because the mean of its divisors is an integer number (5554997500).

Almost surely, 2^11109994999 is an apocalyptic number.

11109994999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109994999 is an equidigital number, since it uses as much as digits as its factorization.

11109994999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2125764, while the sum is 61.

The spelling of 11109994999 in words is "eleven billion, one hundred nine million, nine hundred ninety-four thousand, nine hundred ninety-nine".